For u Dileep, now when the tojan remover is scaning it is saying that- this file(C:\Documents and Settings\Administrator\START MENU\PROGRAMS\STARTUP\desktop.ini.vir)is in use/locked-it not be scanned,then i clicked disable file by renaming it.. and the result of the scan was - no active malicious files were found and no change where made ater that an icon camed "the above file had changed by torjan remover,do u want to save it?" i clicked yes.. but still i cant open my c:/program, when again scaning still the above matters repeates... what to do my friend..??

Once you format your drive in which the operating system windows xp resides this is possible only from the windows xp cd ...
ask some of your friends and get the cd ... or you download the image from the net and write in to the cd and then do that work ....

you can download the windows XP image file from some of the sites below .... it may take many hours to download and it depebds upon the speed of the net connection ..

www.bootdisk.com/bootdisk.htm

www.svrops.com/svrops/dwnlddisk.htm

www.allbootdisks.com/

www.allbootdisks.com/download/xppro.html

www.optimizingpc.com/howtouse/imagebootdisk.html

www.brothersoft.com/downloads/windows-xp-boot-disk-image.html

after downloading you write in to the cd and boot it from the disc by changing the first boot device in bios settings ...

after that select the drive in which the previous operating system resides and it will give you the warning that there is already windows folder in that drive then it will offer you for the format then format that drive and then follow the instructions to install that s it ..
you will get install with the windows ...
while installation it will ask for the product key then if you have downloaded from net then in that image there will be serial key note it down and then insert it when it asks that s it ...